ref(input): move mouse.zig and key.zig into public input.zig namespace

examples/container.zig

@@ -119,9 +119,9 @@ pub fn main() !void {
             .quit => break,
             .resize => |size| try renderer.resize(size),
             .key => |key| {
-                if (key.matches(.{ .cp = 'q' })) app.quit();
+                if (key.eql(.{ .cp = 'q' })) app.quit();
 
-                if (key.matches(.{ .cp = 'n', .mod = .{ .ctrl = true } })) {
+                if (key.eql(.{ .cp = 'n', .mod = .{ .ctrl = true } })) {
                     try app.interrupt();
                     defer app.start() catch @panic("could not start app event loop");
                     var child = std.process.Child.init(&.{"hx"}, allocator);